有几个解决方案你可以使用！但我相信stopPropagation（）将最适合你！我还添加了click.once到您的addEvent函数，因为我假设您只想调用它来添加事件侦听器！

<template>
  <div id="app">
    <button @click.once="addEvent">add event body</button>
  </div>
</template>
<script>
import HelloWorld from './components/HelloWorld.vue';

export default {
  name: 'App',
  methods: {
    addEvent(event) {
      event.stopPropagation()
      document.body.addEventListener('click', this.doSomething);
    },
    doSomething() {
      console.log('click');
    },
  },
};
</script>

以下是文档以供参考！https://v2.vuejs.org/v2/guide/events.html#Event-Modifiers https://developer.mozilla.org/en-US/docs/Web/API/Event/stopPropagation

你需要使用stop修饰符来实现这个行为。它和event.stopPropagation()一样，但是它是一种处理事件的有效方法：https://vuejs.org/guide/essentials/event-handling.html#event-modifiers

<template>
  <div id="app">
    <button @click.stop="addEvent">add event body</button>
  </div>
</template>
<script>
import HelloWorld from './components/HelloWorld.vue';

export default {
  name: 'App',
  methods: {
    addEvent() {
      console.log('ADDED');
      document.body.addEventListener('click', this.doSomething);
    },
    doSomething() {
      console.log('click');
    },
  },
};
</script>

<style>
body {
  height: 100vh;
  width: 100vw;
}
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

交互式示例：https://stackblitz.com/edit/vue-nknkm9?file=src%2FApp.vue